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BIPOLAR ANALOG OUTPUT
4.3.2
Calibration of the indicator (Pr. 838, Pr. 857, C0)
Refer to the following flow chart to calibrate the indicator.
Start
Connect the indicator across terminals DA1
and terminal 5.
Use Pr. 857 to make calibration of indicator at
0 voltage.
Set "21" (reference voltage output) in Pr. 838.
Run the inverter
Use C0 (Pr. 900) to make adjustment, then set.
End
Use Pr. 838 to set the types of the signals to be monitored.
CAUTION
⋅ If calibration is porformed without setting "21" (reference voltage output) in Pr. 838, terminal FM of the
inverter is calibrated.
⋅ When FR-A7AZ is remounted on other inverter, use Pr. 857 and C0 (Pr. 900) of the inverter with the option to
calibrate again.
⋅ When FR-A7AZ and FR-A7AY are used together with "1 or 11" set in Pr. 309 Analog output signal voltage/current
switchover and "21" set in Pr. 310 Analog meter voltage output selection, C0 (Pr. 900) calibrates terminal AM0 of the
FR-A7AY. (Pr. 309 and Pr. 310 are parameters for FR-A7AY. Refer to the Instruction Manual of the FR-A7AY for
details of Pr. 309 and Pr. 310.)
18
At this time, check that the polarity is correct. Terminal DA1 is plus.
If the indicator needle does not point to 0 when voltage output is 0,
adjust the setting value of Pr. 857 DA1 0V adjustment in between 900%
and 1100%.
Setting "21" in Pr. 838 outputs 10VDC to deflect the indicator needle.
If the inverter is at a stop, (press the
(Motor needs not be connected.)
Turn
to adjust the indicator needle to deflect to full-scale,
then press
to set.
(Refer to page 19.)
or
) to start the inverter.
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